I think that gnubg is still showing the hint for the original doubling decision. Gnubg's analysis of beavers is not fully implemented, if I recall correctly.
You seem to be using the command line. When I use the GUI and ask for a hint when user beavers, I get a blank window. Perhaps one of the coders can comment further. Regards, Ian Shaw > -----Original Message----- > From: Kari Uusitalo [mailto:[EMAIL PROTECTED] > Sent: 16 June 2006 16:17 > To: Ian Shaw > Cc: bug-gnubg@gnu.org > Subject: Re: [Bug-gnubg] Hint on cube decisions > > Thanks, that helped! > > Still I wonder the beaver/redouble things. I tried it with > two human players and the results were somewhat odd as you > can see below. I have but some comments and a quiestion in between. > > BR, > Kari > > The game output: > > (user) hint > > Cube analysis > 2-ply cubeless equity +0.872 > 0.773 0.345 0.043 - 0.227 0.059 0.002 > Cubeful equities: > 1. Double, pass +1.000 > 2. Double, take +1.589 ( +0.589) > 3. No double +0.971 ( -0.029) > Proper cube action: Double, pass > > >>>>>> > The doubling seems like a very good advice as we are leading > so heavily. > >>>>>> > > (user) double > user doubles. > GNU Backgammon Position ID: YefBADhsm8gRQA > Match ID : cBEAAAAAAAAA > +13-14-15-16-17-18------19-20-21-22-23-24-+ O: gnubg > | X X O | | O O O | 0 points > | X O | | O O | Cube offered at 2 > | X O | | O | > | O | | | > | | | | > v| |BAR| | > | | | | > | | | | > | | | O | > | O | | X X X X O | > | O X X | X | X X X X O | 0 points > +12-11-10--9--8--7-------6--5--4--3--2--1-+ X: user > > (gnubg) hint > Take decision: > > Equity for take: -1.589 > Equity for pass: -1.000 > > Your proper cube action: Pass. > > >>>>>> > This also seems like a good advice as gnubg player is behind > so clearly. > > However, he redoubles just for this test. > >>>>>> > > (gnubg) beaver > gnubg accepts and immediately redoubles to 4. > GNU Backgammon Position ID: YefBADhsm8gRQA > Match ID : QRkAAAAAAAAA > +13-14-15-16-17-18------19-20-21-22-23-24-+ O: gnubg > | X X O | | O O O | 0 points > | X O | | O O | > | X O | | O | > | O | | | > | | | | > v| |BAR| | > | | | | > | | | | > | | | O | > | O | | X X X X O | Cube offered at 4 > | O X X | X | X X X X O | 0 points > +12-11-10--9--8--7-------6--5--4--3--2--1-+ X: user > > (user) hint > Take decision: > > Equity for take: -1.592 > Equity for pass: -1.000 > > Your proper cube action: Pass. > > >>>>>> > How can the correct action be to "Pass" when the user is > leading so much? > >>>>>> > > 2006/6/16, Ian Shaw <[EMAIL PROTECTED]>: > > > > From: Kari Uusitalo Sent: 16 June 2006 11:38 > > > > > I am playing around with the GNU BG and tried to find info about > > > what excatly different lines mean in hint ouputs ofr cube > selection. > > > > > > For example, I have the cube in a certain game situation and the > > > hint returns: > > > > > > >>>>>>>> > > > Cube analysis > > > 2-ply cubeless equity -0.039 > > > 0.479 0.108 0.002 - 0.521 0.105 0.002 Cubeful equities: > > > 1. No double +0.124 > > > 2. Double, pass +1.000 ( +0.876) > > > 3. Double, take -0.433 ( -0.556) > > > Proper cube action: No redouble, beaver (38.8%) > > > >>>>>>>> > > > > > > What exactly the different lines mean. I guess, the last line > > > is the most important and in this case I should not double. > > > What does the "beaver"-text in that particular line mean and > > > what does the percentage figure stand for? > > > > When an opponent doubles, some games allow to to Beaver. > E.g. If Player > > A doubles to 2, Player B can Beaver to 4 - keeping the cube > on his side. > > > > Roughly speaking, you should beaver if your opponent has doubled you > > when you are the favourite to win, as in the example above. > The opponent > > is expected to win 52.1% of the games, so gnubg recommends that you > > don't double, but if you do, then the opponent should beaver. > > > > > > The 38.8% figure means that the double would be correct if 38.8% of > > opponents were to mistakenly pass the double. > > > > I hope this helps. > > > > -- Ian Shaw > > > > > > > _______________________________________________ Bug-gnubg mailing list Bug-gnubg@gnu.org http://lists.gnu.org/mailman/listinfo/bug-gnubg
